Abstract
A methodology of rotating vibration energy harvesting with nonlinear magnetic forces is studied in this paper. A mathematical model of rotating piezoelectric vibration energy harvesters with nonlinear magnetic forces is built by the Lagrange’s equation and assumed-modes method. The nonlinear model is solved by numerical methods. Then the effects of distance between two magnets are studied. The results demonstrate that the performance of rotating piezoelectric vibration energy harvester with nonlinear magnetic force is better than traditional linear ones when the distance between two magnets is appropriate.
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